Can You Put STP Gas Cleaner In Your Lawn Mower?

Too Much of a Good Thing

• A particular brand of fuel system cleaner may have been selected for any number of reasons, but the most important consideration may not be the brand, at all. It is necessary to make sure the fuel-to-cleaner ratio is correct. Too much cleaner can raise the octane level, causing the mower to run rich and emit black smoke. The carbon solids that color the smoke can buildup on engine components, and any intended benefit is lost.

Do The Math

• The directions for use that appear on automotive fuel system cleaners are simple. The exact amount to add to small quantities of fuel is usually not outlined, however. Cleaner directions typically mention a range of fuel amounts to be treated. The lower figure renders the strongest concentrations deemed safe. If a container of cleaner is recommended to supplement 10 to 20 gallons of fuel, use a 10th of the contents per each gallon of gasoline for a strong mixture.

Maintenance Levels

• The cleaner can be diluted further for a method of system maintenance, once any perceived problems are remedied. Add a 10th of the container to 2 gallons of gasoline, or cut the portion to half of the previous dose for 1 gallon. The dosage amount can vary by the saturation recommended and the cleaner container's size. Automotive fuel system cleaners are concocted with the average automobile in mind, so proportional adjustments are required.

Savings

• Lawn mower manufacturers have products available that are tailored to suit the equipment being treated. Small fuel tanks and tiny carburetors on mowers are often subject to harsher operations than automotive components. Prolonged storage and constant exposure to dirt and dust create more difficulties for small engines than those faced by most cars and trucks. Products designed in consideration of these conditions may be more beneficial than some substitutes. Also, the savings may be more evident in the long run.